<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TrueNorthStar &raquo;</TD></TR><TR><TD CLASS="quote">

I have seen the same thing... At the last IDRC event I went to I was having the same problem.... I had an ACT 6 puck clutch also.

There was a problem with the pressure plate not disengaging completely. It was not "flat". You could see some discoloration caused by heat over an area of about 1/4" wide and 2" long.

This put a slight amount of drag between the motor and input shaft not allowing the synchros to do their job. Just think about what the synchro has to do… It has to “synchronize” the gear you are selecting and the shaft it rides on before the slider can “lock” the gear into place. So going from 1st to 2nd gear the synchro has to slow down the input shaft to match 2nd gears’ ratio. If the clutch is dragging, the clutch is fighting the syncho. The clutch will win to

I switched out the clutch with an Action unit and the problem was gone.


To the O.P. :

I would check the travel of your slave cylinder. If it is too short, then your problem is in the hydraulic system. If not then the only way you will find out is to drop the tranny and inspect the clutch for uneven wear.... if that’s not it, then you will have to tear the tranny apart

I also wouldn't do any high rpm shifting until you get it fixed, as it will just cause more damage.

Modified by TrueNorthStar at 2:16 PM 5/30/2008</TD></TR></TABLE>

 

I was having a problem getting in to 2nd and 3rd gear on my GSR trans too. I hooked up the full throttle shift option on my S300, and the shifting problems went away. I tried the FTS rev limit at 7000 rpms, and worked good, but my boost level was falling down to 7 psi then back up to 30 psi between 1st and 2nd. I'm going to try raising the rev limit to 7500, then to 8000 just to try it and see if it improves. I'm also installing the PWM boost control option, so I don't have to run 30 psi in 1st and 2nd anymore. lol Jarrod

 

I'm struggling in my mind to figure out how, less material on the clutch disk could cause it to not let go when i press the pedal down, but due to the appearance of this disk & the missing parts of the pads. I'm replacing it anyways. Hopfully this will resolve the shifting issues.

 

just FYI for anyone else that might run into issues with these same symptoms. The replacement clutch resolved my issues.

 

one of my friends went through the same thing, he messed around with his clutch master cylinder and open a valve and it sort of bled the system and let some pressure out..

after that everything worked good

it started doing it again but we never got around to replacing the cms